Career
He competed at the 2012 Summer Paralympics, winning gold in the 50 metre freestyle S4. Mustafaiev is from Aqyar/Sevastopil. Ukraine. When he as five years old, he was diagnosed with Charcot-Marie-Tooth.
He was previously married to Ukrainian Paralympic shooter Olga Mustafaieva.
He speaks Russian, and does not speak Ukrainian. Mustafaiev started swimming in 2008 in Sevastopol, Ukraine as part of a rehabilitation regime for a weak back and hand.
While he briefly looked at fencing, he committed to swimming because the issues with his hand made fencing difficult. He competed in the Men's 50m Freestyle S4.
Mustafaiev was one of three Ukrainian athletes competing at the 2012 Summer Paralympics from the Crimea region, with the other two including fellow swimmer Dmytro Kryzhanivskyi and shooter Olga Mustafaieva.
He had several other events on his London swimming program including the 100m freestyle, 50m backstroke and 200m freestyle races in London. He finished eighth and last in the 50m backstroke final with a time of 52.51 seconds. This time was slower than the heats, where he swam a time of 51.92.
In Montreal for the 2013 IPC World Championships, Mustafaiev claimed gold in the men’s 50 freestyle S4 with a time of 37.96 seconds.
In October 2014, Mustafaiev, two other Crimean Paralympic and Deaflympic swimmers and a Crimean Paralympic or Deaflympic coach lost their Ukrainian sports scholarship by a May 2013 presidential decree after reports they defected to Russia. Around this time, he also formally switched his nationality, and now represents Russia in international competitions.
He failed to make it out of the heats in the 100m Freestyle S4 and the 50m Backstroke S4 events.